Antenna assembly and electronic device

Abstract

The present disclosure relates to an antenna assembly and an electronic device, and belongs to the technical field of electronic devices. The first frame of the antenna assembly comprises a first frame body, a first break joint and a second frame body. The first frame body has a first frame point and a second frame point. The second frame body has a third frame point, a fourth frame point and a first ground point. A first switch circuit is connected to the second frame point and the third frame point respectively. The first frame point is connected to a first feed source. In a first mode, the second frame point is electrically connected to the third frame point through the first switch circuit. The first frame body and the second frame body between the first frame point and the first ground point serve as a first radiation branch. In a second mode, the first switch circuit is disconnected. The third frame point is connected to a second feed source. The fourth frame point is grounded. The second frame body between the third frame point and the fourth frame point serves as a second radiation branch. Two different antenna modes can be constructed, such as an LB antenna mode using the first radiation branch and an n78 antenna mode using the second radiation branch, thereby achieving high communication performance.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to an antenna assembly and electronic device. Background Technology

[0002] In smart electronic devices such as mobile phones, tablets, and wearable devices, antennas are crucial components for signal transmission. As users continuously demand higher performance from electronic devices, the types of antennas integrated into these devices are becoming increasingly diverse.

[0003] Taking a mobile phone as an example, an electronic device can include a back cover, a frame, and a display screen. Along the thickness direction of the electronic device, the back cover and the display screen can be located on opposite sides of the frame. The frame, back cover, and display screen form a cavity, within which a main circuit board can be housed. Currently, the frame of most electronic devices is a metal frame, which also functions as an antenna. The antenna constructed from the metal frame can be electrically connected to the main circuit board located within the cavity. For example, during communication, the metal frame can receive signals from the base station and transmit them to the main circuit board, or vice versa.

[0004] The limited number and frequency bands of antennas in current electronic devices cannot meet communication requirements, thus affecting the communication performance of electronic devices. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, this disclosure provides an antenna assembly and an electronic device.

[0006] According to a first aspect of the present disclosure, an antenna assembly is provided, comprising:

[0007] The first frame includes a first frame body and a second frame body, with a first gap between the first frame body and the second frame body. The first frame body has a first frame point and a second frame point at its two ends, respectively. The second frame body has a third frame point, a fourth frame point, and a first grounding point distributed sequentially. The third frame point and the first grounding point are located at both ends of the second frame body. The third frame point is located adjacent to the second frame point. The first frame point is electrically connected to the first feed source.

[0008] The first switching circuit is connected to the second and third frame points respectively.

[0009] The antenna assembly includes a first mode and a second mode. When the antenna assembly is in the first mode, the first switching circuit is turned on, and the second frame point is electrically connected to the third frame point through the first switching circuit. The first frame and the second frame located between the first frame point and the first ground point serve as the first radiating branch.

[0010] When the antenna assembly is in the second mode, the third frame point is electrically connected to the second feed source, the first switching circuit is disconnected, the fourth frame point is grounded, and the second frame located between the third frame point and the fourth frame point serves as the second radiating branch.

[0011] In one possible implementation, the antenna assembly also includes:

[0012] The first tuning branch is connected to the second frame point.

[0013] First grounding branch.

[0014] The first frame also has a fifth frame point, which is located between the first frame point and the second frame point, and the first grounding branch is connected to the fifth frame point.

[0015] When the antenna assembly is in the second mode, the first tuning branch is turned on, and the second frame point is grounded through the first tuning branch; the first grounding branch is turned on, and the fifth frame point is grounded through the first grounding branch. The first frame located between the fifth frame point and the second frame point serves as the first parasitic stub.

[0016] In one possible implementation, the antenna assembly further includes a second switching circuit connected to the first frame point, the second switching circuit including a second ground branch. When the antenna assembly is in a second mode, the second ground branch is turned on, and the first frame point is grounded through the second ground branch.

[0017] In one possible implementation, the first switching circuit includes two parallel second tuning branches. When the antenna assembly is in the first mode, at least one of the second tuning branches is turned on.

[0018] In one possible implementation, the second switching circuit further includes one or more third tuning branches connected in parallel with the second ground branch. When the antenna assembly is in the first mode, at least one of the third tuning branches is turned on, and the first block point is grounded through the third tuning branch.

[0019] In one possible implementation, the antenna assembly further includes a third switching circuit connected to the fourth frame point. The third switching circuit includes a third ground branch and a fourth tuning branch connected in parallel. When the antenna assembly is in the second mode, the third ground branch is activated, and the fourth frame point is grounded through the third ground branch.

[0020] When the antenna assembly is in the first mode, the fourth tuning branch is turned on, and the fourth block point is grounded through the fourth tuning branch.

[0021] In one possible implementation, the antenna assembly also includes an isolation switch connected between the second feed and the third frame point.

[0022] In one possible implementation, the antenna assembly also includes a matching inductor, one end of which is electrically connected to the fifth frame point and the other end of which is grounded.

[0023] In one possible implementation, the antenna assembly also includes:

[0024] The second frame is used to rotate with the first frame; the second frame includes a third frame and a fourth frame, with a second gap between the third frame and the fourth frame. The third frame has a sixth frame point and a seventh frame point at its two ends, respectively. The fourth frame has an eighth frame point, a ninth frame point, and a second grounding point distributed sequentially. The eighth frame point and the second grounding point are located at the two ends of the fourth frame. The sixth frame point, the seventh frame point, the eighth frame point, the ninth frame point, and the second grounding point correspond to the positions of the first frame point, the second frame point, the third frame point, the fourth frame point, and the first grounding point, respectively.

[0025] The fourth switch circuit is connected to the seventh and eighth frame points respectively.

[0026] When the antenna assembly is in the first mode, the fourth switch circuit is turned on, and the seventh and eighth frame points are electrically connected through the fourth switch circuit. The third and fourth frames located between the sixth frame point and the second ground point serve as the second parasitic stubs.

[0027] When the antenna assembly is in the second mode, the fourth switch circuit is disconnected, the ninth frame point is grounded, and the fourth frame located between the ninth frame point and the eighth frame point serves as the third parasitic branch.

[0028] In one possible implementation, the antenna assembly also includes:

[0029] The fourth grounding branch is connected to the seventh frame point.

[0030] The fifth switching circuit includes one or more parallel fifth tuning branches and is connected to the sixth block point.

[0031] When the antenna assembly is in the second mode, the fourth ground branch is activated, and the seventh frame point is grounded through the fourth ground branch; at least one fifth tuning branch is activated, and the sixth frame point is grounded through at least one fifth tuning branch. The third frame located between the sixth and seventh frame points serves as the fourth parasitic stub.

[0032] In one possible implementation, the fifth switching circuit also includes a sixth tuning branch connected in parallel. When the antenna assembly is in the first mode, at least one of the sixth and fifth tuning branches is turned on, and the sixth block point is grounded through at least one of the sixth and fifth tuning branches.

[0033] In one possible implementation, the fourth switching circuit includes two parallel seventh tuning branches. When the antenna assembly is in the first mode, at least one of the seventh tuning branches is turned on.

[0034] In one possible implementation, the antenna assembly further includes a sixth switching circuit connected to the ninth block point, the sixth switching circuit including a fifth grounding branch and an eighth tuning branch connected in parallel.

[0035] When the antenna assembly is in the second mode, the fifth grounding branch is turned on, and the ninth frame point is grounded through the fifth grounding branch.

[0036] When the antenna assembly is in the first mode, the eighth tuning branch is turned on, and the ninth block point is grounded through the eighth tuning branch.

[0037] In one possible implementation, the second tuning branch includes a switching element and a capacitor.

[0038] One of the second and third points is electrically connected to one end of the capacitor, and the other of the second and third points is connected to the other end of the capacitor via a switching element.

[0039] According to a second aspect of the present disclosure, an electronic device is provided, including a first feed source, a second feed source, and an antenna assembly of any one of the above, wherein the first feed source is electrically connected to a first frame point of the antenna assembly, and the second feed source is electrically connected to a third frame point of the antenna assembly.

[0040] In one possible implementation, the electronic device also includes a pivot structure, through which the first frame and the second frame are rotatably engaged to open and close the electronic device.

[0041] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0042] The antenna assembly and electronic device disclosed herein include an antenna assembly comprising a first frame and a first switching circuit. A first gap exists between a first frame and a second frame of the first frame, giving the first frame a first frame point and a second frame point. The second frame has a third frame point, a fourth frame point, and a first ground point, with the second and third frame points positioned adjacent to each other. The first switching circuit is connected to both the second and third frame points. The first frame point is connected to a first feed source. When the antenna assembly is in a first mode, the second frame point is electrically connected to the third frame point via the conducting first switching circuit, allowing the first and second frames located between the first frame point and the first ground point to jointly function as a first radiating branch. When the antenna assembly is in a second mode, the first switching circuit is disconnected, the third frame point is connected to a second feed source, and the fourth frame point is grounded, allowing a portion of the second frame located between the third and fourth frame points to function as a second radiating branch. In this way, by utilizing the first and second frames of the first frame, two antenna modes with different frequencies can be constructed. When the antenna assembly is in the first mode, the longer first radiating stub can construct a lower frequency antenna mode; when the antenna assembly is in the second mode, the shorter second radiating stub can construct a higher frequency antenna mode. The antenna assembly can realize two antenna modes. For example, when the antenna assembly is in the first mode, the first radiating stub can be used to construct an LB antenna mode; when the antenna assembly is in the second mode, the second radiating stub can be used to construct an n78 antenna mode. The antenna assembly can basically cover the low-frequency band required by electronic devices such as mobile phones, and has high communication performance.

[0043] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0045] Figure 1 This is a schematic diagram illustrating the structure of an electronic device in a folded state according to some embodiments of the present disclosure;

[0046] Figure 2 This is a schematic diagram illustrating the structure of an electronic device in an open state according to some embodiments of the present disclosure;

[0047] Figure 3 This is a partial structural schematic diagram of an antenna assembly when an electronic device is in a closed state, according to some embodiments of the present disclosure;

[0048] Figure 3a This is a schematic diagram illustrating the connection between a first frame, a second frame, and a topology network in an antenna assembly according to some embodiments of the present disclosure;

[0049] Figure 4 This is a schematic diagram showing the connection between the first frame, the second frame, and the topology network in another antenna assembly according to some embodiments of the present disclosure;

[0050] Figure 5 This is a schematic diagram illustrating the current distribution in an antenna assembly according to some embodiments of the present disclosure;

[0051] Figure 6 This is a simulation diagram of the radiation efficiency of an LB antenna constructed from an antenna assembly when the electronic device is in a closed state, according to some embodiments of the present disclosure.

[0052] Figure 7 This is a simulation diagram of the radiation efficiency of an LB antenna constructed from an antenna assembly when an electronic device is in the on state, according to some embodiments of the present disclosure.

[0053] Figure 8 This is a simulation diagram illustrating the radiation efficiency of an n78 antenna constructed from an antenna assembly when the electronic device is in a closed and open state, according to some embodiments of the present disclosure. Detailed Implementation

[0054] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0055] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0056] Some embodiments of this disclosure provide an electronic device that can employ one or more of the following communication technologies: Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, Wireless Fidelity (WiFi) communication technology, Near Field Communication (NFC) communication technology, Global System for Mobile Communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, and other future communication technologies.

[0057] The electronic device may include, but is not limited to, mobile phones, tablets, laptops, smart home devices, smart bracelets, smartwatches, smart helmets, and smart glasses. It may also include cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, electronic devices in 5G networks, or electronic devices in future evolved public land mobile networks (PLMNs).

[0058] Among them, electronic devices can be non-foldable electronic devices. For example, taking a mobile phone as an example, an electronic device can be a candybar phone, such as a candybar horizontal screen phone or a candybar vertical screen phone, etc.

[0059] Alternatively, electronic devices can also be foldable. For example, a mobile phone can be a foldable foldable phone, such as a landscape foldable phone or a portrait foldable phone.

[0060] The electronic device is a foldable electronic device. For example, if it is a foldable phone, the foldable phone can be one where the display folds outwards. Alternatively, the foldable phone can be one where the display folds inwards. Or, the foldable phone can be one where part of the display folds inwards and part of the display folds outwards, etc.

[0061] In this embodiment of the disclosure, the electronic device is a foldable electronic device, such as a foldable mobile phone with an inwardly folding display screen.

[0062] Figure 1 This is a schematic diagram illustrating the structure of an electronic device in a folded state according to some embodiments of the present disclosure. Figure 2 This is a schematic diagram illustrating the structure of an electronic device in an open state according to some embodiments of the present disclosure.

[0063] Combination Figure 1 and Figure 2 As shown, the electronic device 100 may include a hinge structure 103, a middle frame 101, and a display screen 102. The number of middle frames 101 may be at least two. For example, taking two housings as an example, they may be a first middle frame 101a and a second middle frame 101b. The first middle frame 101a and the second middle frame 101b may be located on both sides of the hinge structure 103. The first middle frame 101a and the second middle frame 101b are respectively connected to the hinge structure 103.

[0064] See Figure 2 As shown, the display screen 102 can be disposed on the hinge structure 103 and the middle frame 101. For example, the display screen 102 can be located on the same side of the first middle frame 101a, the second middle frame 101b and the hinge structure 103. The part of the display screen 102 opposite to the first middle frame 101a (opposite in the thickness direction) can be laid flat on the first middle frame 101a, and the part of the display screen 102 opposite to the second middle frame 101b can be laid flat on the second middle frame 101b.

[0065] The two middle frames 101 are connected by a pivot structure 103, and the two middle frames 101 can rotate relative to each other through the pivot structure 103. The first middle frame 101a and the second middle frame 101b can be rotatably engaged through the pivot structure 103, allowing the first middle frame 101a and the second middle frame 101b to rotate relative to each other, thereby realizing the relative folding or unfolding of the first middle frame 101a and the second middle frame 101b, and enabling the electronic device 100 to switch between a closed state and an open state. The portion of the display screen 102 opposite to the pivot structure 103 can be folded or unfolded as the first middle frame 101a and the second middle frame 101b rotate.

[0066] The first middle frame 101a and the second middle frame 101b can be folded relative to each other into a closed state, see [reference]. Figure 1 As shown, for example, when the first middle frame 101a and the second middle frame 101b are in the closed state, they can be completely closed together until they are parallel to each other (a slight deviation is allowed). At this time, the electronic device 100 is in the closed state, also known as the folded state.

[0067] See Figure 2 As shown, the first middle frame 101a and the second middle frame 101b can be unfolded to an open state relative to each other. For example, when the first middle frame 101a and the second middle frame 101b are in the open state, the unfolding angle between the first middle frame 101a and the pivot structure 103 and the second middle frame 101b can be approximately 180°, and the electronic device 100 as a whole is in the open state, also known as the flattened state.

[0068] It should be noted that slight deviations are allowed in the angles illustrated in the embodiments of this application. For example, Figure 2 The unfolding angle of the electronic device 100 shown can be 180°, or approximately 180°, such as 170°, 175°, 185°, or 190°.

[0069] The first middle frame 101a and the second middle frame 101b can rotate relative to each other (fold or unfold) to an intermediate state, so that the electronic device 100 is in an intermediate state. The intermediate state can be any state between the folded state and the flattened state. That is, the electronic device 100 can switch between the flattened state (i.e., the open state) and the folded state (i.e., the closed state) through the movement of the pivot structure 103, thereby realizing the opening and closing of the electronic device 100.

[0070] In the embodiments of this disclosure, for ease of description, as follows: Figure 1 and Figure 2 As shown, the width direction of the middle frame 101 (such as the first middle frame 101a) is taken as the x-direction, the length direction of the middle frame 101 is taken as the y-direction, and the thickness direction of the middle frame 101 is taken as the z-direction. The width direction, length direction, and thickness direction can intersect each other. For example, the outer contour shape of the middle frame 101 can be a rectangle-like shape, and the width direction, length direction, and thickness direction can be perpendicular to each other.

[0071] It is understandable that when the electronic device 100 is in a folded or unfolded state, the width, length, and height directions of the electronic device 100 are aligned with the width, length, and height directions of the middle frame 101, respectively. (Refer to...) Figure 1 and Figure 2 The x, y, and z directions are specified in the text. The length, width, and thickness in the embodiments of this application are for descriptive convenience only and do not imply any limitation on the dimensions. For example, the length can be greater than, equal to, or less than the width.

[0072] Of course, in some other embodiments, the outer contour shape of the middle frame 101 can also be a regular or irregular shape such as a square, circle, ellipse, or rounded rectangle.

[0073] It should be noted that the electronic device 100 may include only two middle frames 101, such as one first middle frame 101a and one second middle frame 101b, so that the electronic device 100 is in a folded state, with the first middle frame 101a and the second middle frame 101b folded relative to each other into two layers. For example, the electronic device 100 includes a first middle frame 101a, a second middle frame 101b, and a hinge structure 103. The first middle frame 101a and the second middle frame 101b are rotatably connected through the hinge structure 103. When the first middle frame 101a and the second middle frame 101b are folded relative to each other in the folded state, the electronic device 100 has a form of two layers of middle frames 101 stacked together (see reference). Figure 1 (As shown).

[0074] Alternatively, the electronic device 100 may include two or more middle frames 101, such as the number of at least one of the first middle frame 101a and the second middle frame 101b, and the number of the pivot structure 103 may also be multiple. Adjacent first middle frames 101a and second middle frames 101b can be connected by a pivot structure 103, so that the electronic device can be folded into a multi-layered form.

[0075] For example, the electronic device 100 may include two first middle frames 101a, one second middle frame 101b, and two pivot structures 103. The two first middle frames 101a are located on both sides of the second middle frame 101b, and the two first middle frames 101a are rotatably connected to the second middle frame 101b through a pivot structure 103. One of the first middle frames 101a can be folded relative to the second middle frame 101b, and the other first middle frame 101a can also be folded relative to the second middle frame 101b, so that the electronic device 100 is in a folded state, with the first middle frames 101a and the second middle frame 101b folded relative to each other in a three-layer stacked form. When one of the first middle frames 101a and the second middle frame 101b are unfolded relative to each other to a flattened state, the electronic device 100 is in a flattened state.

[0076] For a foldable electronic device with an outward-folding display, the display 102 can be disposed on the outer surfaces of the first middle frame 101a, the second middle frame 101b, and the hinge structure 103. For a foldable electronic device with an inward-folding display, the display 102 can be disposed on the inner surfaces of the first middle frame 101a, the second middle frame 101b, and the hinge structure 103.

[0077] In this embodiment of the disclosure, the electronic device 100 includes two housings, a first middle frame 101a and a second middle frame 101b, and the first middle frame 101a and the second middle frame 101b are rotatably coupled through a pivot structure 103.

[0078] The electronic device 100 may also include a back cover (not shown in the figure), the display screen 102 and the back cover may be located on opposite sides of the middle frame 101 along the thickness direction (such as the z direction), the back cover, the display screen 102 and the middle frame 101 together form a receiving space, which can be used to assemble and receive various structural components of the electronic device 100.

[0079] The middle frame 101 may include a border, which, for example, can be a ring-shaped frame structure. For instance, taking the outer contour shape of the middle frame 101 as a rectangle, the border can be a ring-shaped frame structure with a rectangular outer contour. The two opposite sides of the border along the thickness direction (such as the z-direction) can be respectively assembled with the back cover and the display screen 102.

[0080] The middle frame 101 may also include a middle plate (not shown in the figure). For example, the middle plate may be a plate-like structural member, or a flat plate structure with a rectangular outer contour. A frame may be provided around the middle plate. The middle plate can provide an assembly site for the various structural members within the accommodating space and enhance the strength of the middle frame 101.

[0081] For example, see Figure 2 As shown, taking the first middle frame 101a as an example, the first middle frame 101a may include a first side frame 10 and a first middle plate (not shown in the figure). The first side frame 10 may be a ring-shaped frame structure, such as the first side frame 10 may include a first side frame 10a, a second side frame 10b and a third side frame 10c.

[0082] The first side frame 10a and the second side frame 10b can be arranged opposite each other, such as along the length direction (e.g., the y direction). The third side frame 10c can be located between the first side frame 10a and the second side frame 10b. The first side frame 10a, the third side frame 10c and the second side frame 10b can form a first border 10, which can surround the first middle plate.

[0083] The second middle frame 101b may include a second side frame 20 and a second middle plate (not shown in the figure). The structure of the second side frame 20 can match the structure of the first side frame 10. The second side frame 20 may also be a ring-shaped frame structure, such as the second side frame 20 including a fourth side frame 20a, a fifth side frame 20b and a sixth side frame 20c.

[0084] The fourth side frame 20a and the fifth side frame 20b can be arranged relative to each other, such as along the length direction (e.g., the y direction). The sixth side frame 20c can be located between the fourth side frame 20a and the fifth side frame 20b. The fourth side frame 20a, the sixth side frame 20c and the fifth side frame 20b can form a second frame 20, which can surround the second middle plate.

[0085] The electronic device 100 may further include a main circuit board (not shown in the figure), which may be fixed within the aforementioned receiving space. For example, the main circuit board may be mounted on a middle plate. The main circuit board can be used to realize electrical connections or electrical insulation between various electronic devices within the electronic device 100. In some embodiments of this disclosure, the main circuit board may include a processor, controller, memory, etc., and the operation and various functions of the electronic device 100 can be controlled through the main circuit board.

[0086] The electronic device 100 may also include an antenna assembly (not shown) for enabling wireless communication between the electronic device 100 and other devices.

[0087] The antenna assembly may include a feed and an antenna. In some embodiments of this disclosure, the feed may be a chip, and the feed may be disposed within the housing space, such as on a main circuit board. The feed is used to output and receive electrical signals, and the antenna is used to convert the electrical signals output by the feed into electromagnetic wave signals for radiation. Alternatively, the antenna may also be used to convert the received electromagnetic wave signals into electrical signals and transmit them back to the feed.

[0088] The electronic device 100 may include one antenna assembly or multiple antenna assemblies.

[0089] In some embodiments of this disclosure, the frame of the housing (such as the first frame 10 and the second frame 20) can be a structural component made of metal, allowing the frame to be used to construct an antenna assembly. For example, at least part of the frame can serve as a radiating branch of the antenna assembly. The frame can be electrically connected to the main circuit board within the housing space through a feed topology network composed of switching circuits, etc. The feed source on the main circuit board can feed the frame through the topology network, and the frame can be used to radiate and receive signals. The frame and the switching circuits, etc., can together constitute an antenna assembly.

[0090] The structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or arrange the components differently. For example, the electronic device 100 may also include a communication module, a camera module (e.g., a front-facing camera and a rear-facing camera), a microphone, a speaker, a flash, and other devices.

[0091] The following example illustrates the structural composition of an antenna assembly constructed using a frame.

[0092] Figure 3 This is a partial structural schematic diagram of an antenna assembly of an electronic device in a closed state, according to some embodiments of the present disclosure.

[0093] See Figure 3 As shown, the antenna assembly 104 includes a first frame 10, which may include a first frame 11 and a second frame 12 arranged sequentially, with a first gap 13 between the first frame 11 and the second frame 12. That is, there is a gap between the first frame 11 and the second frame 12. For example, the first gap 13 between the first frame 11 and the second frame 12 may be filled with an electrically insulating structure, such as a plastic structure.

[0094] It should be noted that the first frame 10 may also include other frame parts, such as a second frame 12 located between the other frame parts and the first frame 11, with a gap between the second frame 12 and the other frame parts. Alternatively, the first frame 11 may be located between the other frame parts and the second frame 12, with a gap between the first frame 11 and the other frame parts. Figure 3 The first frame 10 may also include a fifth frame 14. The fifth frame 14, the first frame 11, and the second frame 12 may be distributed in sequence, and there is also a gap between the fifth frame 14 and the first frame 11.

[0095] In embodiments of this disclosure, the first frame 11 and the second frame 12 can be two parts of the third side frame 10c of the first frame 10.

[0096] Of course, in some other embodiments of this disclosure, one of the first frame 11 and the second frame 12 may be a portion of the first side frame 10a, and the other may be a portion of the third side frame 10c. Alternatively, one of the first frame 11 and the second frame 12 may be a portion of the second side frame 10b, and the other may be a portion of the third side frame 10c.

[0097] Alternatively, in some other embodiments of this disclosure, the first frame 11 and the second frame 12 may be two parts of the first side frame 10a or the second side frame 10b.

[0098] The first frame 11 may have a first frame point 111 and a second frame point 112 at its two ends. For example, the first frame 11 may have a first frame point 111 and a second frame point 112 at its two ends along the length direction (such as the y direction). In the embodiments of this disclosure, the first frame point 111, the second frame point 112, etc. (including the third frame point 121, the fourth frame point 122, etc. mentioned below) can be a certain position point on the frame structure (such as the first frame 11, the second frame 12, etc.), or the frame point can also be a protruding rib structure of the frame structure.

[0099] For example, see Figure 3 As shown, taking the first frame point 111 of the first frame 11 as an example, the inner side of one end of the first frame 11 along the length direction (such as the y direction) (the side facing the accommodating space enclosed by the first middle frame) may have a protruding rib structure, which can be the first frame point 111.

[0100] The second frame 12 has a third frame point 121, a fourth frame point 122, and a first grounding point 123 distributed sequentially. The third frame point 121 and the first grounding point 123 can be located at opposite ends of the second frame 12. For example, the second frame 12 can have a third frame point 121 and a first grounding point 123 at its two ends along its length (e.g., the y-direction). The third frame point 121 can be located at one end of the second frame 12 adjacent to the first frame 11, and the second frame point 112 can be located at one end of the first frame 11 adjacent to the second frame 12. The second frame point 112 and the third frame point 121 are arranged adjacent to each other, and the first break 13 can be located between the second frame point 112 and the third frame point 121.

[0101] In this embodiment of the disclosure, the grounding point (such as the first grounding point 123 and the second grounding point hereinafter) can be a location on the frame structure, or the grounding point can also be a protruding rib structure on the frame structure. Figure 3 As shown, the inner side of the end of the second frame 12 facing away from the first frame 11 along the length direction (such as the y direction) may have a raised rib structure, which can be a first grounding point 123, and the first grounding point 123 can be grounded.

[0102] Figure 3a This is a schematic diagram illustrating the connection between a first frame, a second frame, and a topology network in an antenna assembly according to some embodiments of the present disclosure. It should be noted that... Figure 3a The positions of the points in the diagram are only used to illustrate the connection relationship with the topology network formed by the switching circuit, etc., and are not used to indicate the specific position of the point structure on the border.

[0103] See Figure 3a As shown, the antenna assembly 104 also includes a first switching circuit 31, as shown in the figure as first switching circuit SW1. The first switching circuit 31 is connected to the second frame point 112 and the third frame point 121 respectively. The first switching circuit 31 may include a switching element (not shown in the figure), for example, a single pole single throw (SPST) switch. The switching element may include an on state and an off state. By changing the state of the switching element, the first switching circuit 31 can be turned on or off.

[0104] Antenna assembly 104 may include two modes, such as a first mode and a second mode. The frequency of the electromagnetic wave signal that antenna assembly 104 can transmit when it is in the first mode and the frequency of the electromagnetic wave signal that antenna assembly 104 can transmit when it is in the second mode may be different. Thus, antenna assembly 104 may include two antenna modes, wherein the frequency of the electromagnetic wave signal that antenna assembly 104 can transmit when it is in the first mode may be lower than the frequency of the electromagnetic wave signal that antenna assembly 104 can transmit when it is in the second mode.

[0105] For example, when antenna assembly 104 is in the first mode, it can be used to transmit electromagnetic waves with frequencies below approximately 30 MHz, making antenna assembly 104 a low-band (LB) antenna. When antenna assembly 104 is in the second mode, it can be used to transmit electromagnetic waves with frequencies from approximately 3.3 GHz to 3.8 GHz, making antenna assembly 104 an n78 antenna in the SUB-6 GHz range.

[0106] When the antenna assembly 104 is in the first mode, the first switching circuit 31 is turned on, and the second frame point 112 and the third frame point 121 can be electrically connected through the first switching circuit 31, connecting the first frame 11 and the second frame 12 together. The first frame 11 and the second frame 12, located between the first frame point 111 and the first ground point 123, can together form the first radiating branch. The first feed 40 of the electronic device can be electrically connected to the first frame point 111, and the first frame point 111 can serve as the feed point of the antenna assembly 104 in the first mode.

[0107] When the antenna assembly 104 is in the first mode, the electrical signal of the first feed 40 can be transmitted to the first radiating stub through the first frame point 111 for radiation, and the electromagnetic wave signal received by the first radiating stub can be converted into an electrical signal and transmitted back to the first feed 40.

[0108] When antenna assembly 104 is in the second mode, the first switching circuit 31 is disconnected, and the electrical connection between the second frame point 112 and the third frame point 121 is broken, thus disconnecting the electrical connection between the first frame 11 and the second frame 12. The third frame point 121 on the second frame 12 can be electrically connected to the second feed source 50 of the electronic device, and the third frame point 121 can serve as the feed point of antenna assembly 104 in the second mode. The fourth frame point 122 can be grounded, so that the portion of the second frame 12 located between the third frame point 121 and the fourth frame point 122 can serve as the second radiating stub. It is understood that the total length of the first radiating stub is greater than the total length of the second radiating stub.

[0109] When the antenna assembly 104 is in the second mode, the electrical signal of the second feed 50 can be transmitted to the second radiating stub through the third frame point 121 for radiation. The electromagnetic wave signal received by the second radiating stub can be converted into an electrical signal and transmitted back to the second feed 50.

[0110] In this way, two antenna modes with different frequencies can be constructed using the first frame 11 and the second frame 12 of the first frame 10. When the antenna assembly 104 is in the first mode, the longer first radiating stub can construct a lower frequency antenna mode. When the antenna assembly 104 is in the second mode, the shorter second radiating stub can construct a higher frequency antenna mode. The antenna assembly 104 can realize two antenna modes. For example, when the antenna assembly 104 is in the first mode, the first radiating stub can be used to construct an LB antenna mode. When the antenna assembly 104 is in the second mode, the second radiating stub can be used to construct an n78 antenna mode. The antenna assembly 104 can basically cover the low-frequency band required by electronic devices such as mobile phones 100, and has high communication performance.

[0111] In some embodiments of this disclosure, to address the feed isolation problem between the two antenna modes in antenna assembly 104, see [link to relevant documentation]. Figure 3a As shown, the antenna assembly 104 also includes an isolation switch 30a connected between the second feed 50 and the third frame point 121. When the antenna assembly 104 is in the first mode, the first switch circuit 31 is turned on, and the first feed 40 can be fed at the first frame point 111. The isolation switch 30a can be turned off to disconnect the electrical connection between the second feed 50 and the third frame point 121, thus directly, simply, and effectively isolating the influence of the second feed 50 on the feeding of the first feed 40.

[0112] When antenna assembly 104 is in the second mode, the isolation switch 30a can be turned on, allowing the second feed source 50 to be fed at the third frame point 121. The first switch circuit 31 is turned off, disconnecting the electrical connection between the first feed source 40 and the second frame 12, effectively isolating the influence of the first feed source 40 on the feeding of the second feed source 50. This gives antenna assembly 104 high isolation, solving the isolation problem between two antenna modes (such as LB antenna mode and n78 antenna mode).

[0113] In some embodiments of this disclosure, see Figure 3a As shown, the antenna assembly 104 also includes a first tuning branch 30b, which is connected to the second frame point 112. In embodiments of this disclosure, tuning branches such as the first tuning branch 30b (including the second tuning branch, third tuning branch, etc. hereinafter) can be branches capable of changing the resonant frequency of the circuit. For example, a tuning branch may include a tuning element. The tuning element can be one or more combinations of inductors, capacitors, etc., and by adjusting the value of the tuning element, the resonant frequency of the signal on the branch can be changed, thus achieving a tuning effect.

[0114] The tuning branch may also include a switching element, which can be connected in series with the tuning element and grounded. By changing the state of the switching element, such as putting the switching element in a conducting or cut-off state, the tuning branch can be turned on or off. When the tuning branch is on, the tuning element is grounded through the switching element, and the signal frequency is tuned through this tuning branch.

[0115] For example, such as Figure 3a As shown, the first tuning branch 30b may include a switching element RF3 and an inductor L1. One end of the inductor L1 may be connected to the second block point 112, and the other end of the inductor L1 may be grounded through the switching element RF3. When the switching element RF3 is in the on or off state, the first tuning branch 30b is turned on or off.

[0116] Of course, in some other embodiments, the tuning element of the first tuning branch 30b can also be a capacitor or other device capable of tuning.

[0117] The first frame 11 also has a fifth frame point 113, which can be located between the first frame point 111 and the second frame point 112. The antenna assembly 104 also includes a first grounding branch 30c, which is connected to the fifth frame point 113. In the embodiments of this disclosure, grounding branches such as the first grounding branch 30c (including the second grounding branch, third grounding branch, etc. mentioned below) can be branches capable of achieving grounding (GND). For example, the grounding branch can include a switching element and a resistive element. The resistive element can be connected in series with the switching element, and the switching element can be grounded. For example, the resistive element can be a 0-ohm resistor. By changing the state of the switching element, such as making the switching element in a conducting state or a cut-off state, the grounding branch can be turned on or off. When the grounding branch is on, a 0-ohm grounding design can be achieved.

[0118] For example, the first grounding branch 30c may include a switching element RF10 and a resistive element R2. One end of the resistive element R2 may be connected to point 113 in the fifth frame, and the other end of the resistive element R2 may be grounded through the switching element RF10. When the switching element RF10 is in an on or off state, the first grounding branch 30c is on or off.

[0119] When antenna assembly 104 is in the second mode, the first tuning branch 30b can be turned on, and the second frame point 112 can be grounded through the first tuning branch 30b. The first grounding branch 30c can be turned on, and the fifth frame point 113 can be grounded through the first grounding branch 30c. The portion of the first frame 11 located between the fifth frame point 113 and the second frame point 112 can serve as the first parasitic stub, and the first tuning branch 30b can tune the signal frequency on the first parasitic stub. In this way, a parasitic stub can be constructed when antenna assembly 104 is in the second mode, improving the radiation efficiency of antenna assembly 104 in the second mode. For example, a parasitic mode of n78 antenna can be constructed, effectively improving the radiation efficiency of n78 antenna mode, which is beneficial to realizing the high-performance communication capability of antenna assembly 104 in the second mode (such as n78 antenna mode).

[0120] In some embodiments of this disclosure, the straight-line distance between the first frame point 111 and the fifth frame point 113 is d1 (refer to...). Figure 3As shown), d1 can be approximately 13mm. The straight-line distance between the fifth frame point 113 and the second frame point 112 is d2, which can be approximately 11mm. The straight-line distance between the third frame point 121 and the fourth frame point 122 is d3, which can be approximately 8mm. The straight-line distance between the fourth frame point 122 and the first grounding point 123 is d4, which can be approximately 14mm. The spacing of the first gap 13 is d5, which can be approximately 0.8mm to 1.6mm; for example, d5 can be approximately 1mm. The straight-line distance between the first frame point 111 and the first grounding point 123 is d6, which can be approximately 47mm. This allows the first frame 11 and the second frame 12 of the first frame 10 to be used to construct the aforementioned first radiating stub, second radiating stub, first parasitic stub, etc., satisfying the transmission requirements of both the first mode and the second mode antenna modes.

[0121] The spacing between the gaps between the first frame 11 or the second frame 12 and other frame parts can be the same as the spacing of the first gap 13. For example, the spacing between the fifth frame 14 and the first frame 11 can be the same as d5.

[0122] To further enhance the communication capability of antenna assembly 104 in the second mode, please refer to [link to relevant documentation]. Figure 3a As shown, the antenna assembly 104 also includes a second switching circuit 32, such as the second switching circuit SW2. The second switching circuit 32 is connected to the first frame point 111. The second switching circuit 32 may include a second grounding branch 321 (see reference). Figure 4 (As shown). For example, the second grounding branch 321 may include a switching element RF8 and a resistive element R1. One end of the resistive element R1 may be connected to the first block point 111, and the other end of the resistive element R1 may be grounded through the switching element RF8. When the switching element RF8 is in the on or off state, the second grounding branch 321 is turned on or off.

[0123] When the antenna assembly 104 is in the second mode, the second grounding branch 321 can be turned on, allowing the first frame point 111 to be grounded through the second grounding branch 321. This grounds the portion of the first frame 11 located between the first frame point 111 and the fifth frame point 113, reducing or avoiding the impact of this portion of the first frame 11 on the second radiating branch, further improving the radiation efficiency of the antenna assembly 104 in the second mode, and further facilitating the realization of high-performance communication capabilities of the antenna assembly 104 in the second mode (such as the n78 antenna mode).

[0124] To ground the fourth block point 122 in the second mode, antenna assembly 104 is positioned as follows. See [link / reference]. Figure 3As shown, the antenna assembly 104 also includes a third switching circuit 33, such as the third switching circuit SW3. The third switching circuit 33 is connected to the fourth block point 122. The third switching circuit 33 may include a third grounding branch 331 (see reference). Figure 4 (As shown). For example, the third grounding branch 331 may include a switching element RF11 and a resistor element R3. One end of the resistor element R3 is connected to the fourth block point 122, and the other end of the resistor element R3 is grounded through the switching element RF11. When the switching element RF11 is in the on or off state, the third grounding branch 331 is on or off.

[0125] When the antenna assembly 104 is in the second mode, the third grounding branch 331 can be turned on, so that the fourth frame point 122 can be grounded through the third grounding branch 331, thus realizing the 0-ohm grounding design of the fourth frame point 122, and thus constructing the first radiating branch.

[0126] In some embodiments of this disclosure, the antenna assembly 104 further includes a matching inductor, such as Figure 3a The matching inductor L9 is connected at one end to the fifth frame point 113 and the other end is grounded. This matching inductor L9 can be an electrostatic discharge (ESD) protection inductor. By placing an ESD protection inductor at the fifth frame point 113 of the first frame 11, which serves as a floating stub, the influence of static electricity on the first switching circuit 31, the second switching circuit 32, etc., connected to the first frame 11 can be effectively reduced, thereby reducing the impact of electrostatic discharge (ESD) on the performance of the antenna assembly 104.

[0127] Furthermore, the current distribution of antenna assembly 104 is strongest at position 113 of the fifth frame (refer to...). Figure 5 As shown in the figure, point 113 in the fifth frame can be the point where the current is strongest in the antenna assembly 104. Connecting the electrostatic protection matching inductor to point 113 in the fifth frame can enhance the effect of the electrostatic protection matching inductor on the S11 parameters and radiation efficiency of the antenna, which is beneficial to improving the performance of the antenna assembly 104.

[0128] For example, the matching inductor L9 can be a 47nH to 100nH electrostatic discharge (ESD) protection inductor, which has a good ESD protection effect. For instance, in some embodiments, the matching inductor can be a 100nH ESD protection inductor.

[0129] Figure 4 This is a schematic diagram illustrating the connection between the first frame, the second frame, and the topology network in another antenna assembly according to some embodiments of this disclosure. Figure 4 The positions of the bounding points are only used to indicate the connection relationship with the topology network formed by the switching circuit, etc., and are not used to indicate the specific position of the bounding point structure on the border.

[0130] In some embodiments of this disclosure, the first switching circuit 31 described above may include two parallel second tuning branches, such as... Figure 4 The second tuning branch 311a and the second tuning branch 311b are included. When the antenna assembly 104 is in the first mode, at least one of the two second tuning branches can be turned on, so that the second block point 112 and the third block point 121 can be electrically connected through at least one second tuning branch.

[0131] The second tuning branch enables signal frequency tuning to meet the signal transmission requirements of the first mode. The design of two parallel second tuning branches allows the antenna assembly 104 to meet the signal transmission needs of different frequency bands in the first mode. For example, selectively changing the on / off state of the two second tuning branches can alter the signal transmission path. Different tuning elements can be used on different transmission paths, achieving tuning of the signal frequency band and thus meeting the transmission requirements of multiple frequency bands. This can satisfy the transmission requirements of multiple frequency bands in LB antenna mode, such as band 28 (B28), band 20 (B20), band 5 (B5), and band 8 (B8).

[0132] For example, see Figure 4 As shown, taking two second tuning branches, 311a and 311b, as an example, when second tuning branch 311a is turned on and second tuning branch 311b is turned off, the signal is tuned through second tuning branch 311a. When second tuning branch 311b is turned on and second tuning branch 311a is turned off, the signal is tuned through second tuning branch 311b. When both second tuning branches 311a and 311b are turned on, the signal is tuned through both branches. Different degrees of signal tuning can satisfy the tuning requirements of multiple frequency bands.

[0133] Specifically, at least one of the two second tuning branches can be selectively activated according to the transmission requirements of signals in different frequency bands, and one or both of the second tuning branches can be used to achieve the tuning effect on the signal.

[0134] For example, the tuning element of each second tuning branch can be a capacitor, one of the second block point 112 and the third block point 121 can be electrically connected to one end of the capacitor, and the other of the second block point 112 and the third block point 121 can be connected to the other end of the capacitor through a switching element, so that a capacitor and a switching element are connected in series between the second block point 112 and the third block point 121. For example, see Figure 4As shown, taking the second tuning branch 311a as an example, it may include a switching element RF1 and a capacitor C1. One end of the capacitor C1 may be electrically connected to the second frame point 112, and the other end of the capacitor C1 may be electrically connected to the third frame point 121 through the switching element RF1. When the switching element RF1 is in the on state or the off state, the second tuning branch 311a is turned on or off.

[0135] Frequency tuning is achieved by using two small capacitors in the first switching circuit 31. Compared with adding a large capacitor for tuning, this reduces losses and facilitates the high-performance communication capability of the antenna assembly 104 in the first mode (such as LB antenna mode).

[0136] When the antenna assembly 104 is in the second mode, the two parallel second tuning branches can be disconnected, thereby breaking the electrical connection between the second block point 112 and the third block point 121.

[0137] To meet the multi-band tuning requirements in the first mode, see [link / reference]. Figure 4 As shown, the second switching circuit 32 may further include one or more third tuning branches, such as third tuning branches 322a, 322b, and 322c. One or more third tuning branches are connected in parallel with the second grounding branch 321.

[0138] The number of third tuning branches can be selected and set according to frequency band requirements. For example, such as Figure 4 An example of the second switching circuit 32 including three parallel third tuning branches is shown.

[0139] When there are multiple third tuning branches, the tuning elements of these branches can be of the same type or different types, depending on the requirements of different frequency bands. For example, ... Figure 4As shown, the third tuning branch 322a may include a series-connected switching element RF5 and an inductor L2. One end of the inductor L2 is electrically connected to the first frame point 111, and the other end of the inductor L2 is grounded through the switching element RF5. When the switching element RF5 is in the on or off state, the third tuning branch 322a is turned on or off. The third tuning branch 322b may include a series-connected switching element RF6 and a capacitor C4. One end of the capacitor C4 is electrically connected to the first frame point 111, and the other end of the capacitor C4 is grounded through the switching element RF6. When the switching element RF6 is in the on or off state, the third tuning branch 322b is turned on or off. The third tuning branch 322c may include a series-connected switching element RF7 and an inductor L3. One end of the inductor L3 is electrically connected to the first frame point 111, and the other end of the inductor L3 is grounded through the switching element RF7. When the switching element RF7 is in the on or off state, the third tuning branch 322c is turned on or off.

[0140] When the antenna assembly 104 is in the first mode, at least one of the third tuning branches is turned on, and the first block point 111 can be grounded through the third tuning branch. The third tuning branch can also be used to tune the signal and meet the transmission requirements of different frequency bands in the first mode.

[0141] Understandably, in some frequency band signal transmission scenarios under the first mode, at least one of the third tuning branches can be turned on to achieve signal tuning. Alternatively, in some frequency band signal transmission scenarios, the third tuning branch can be kept off and not used for tuning, such as using the second tuning branch and / or the fourth tuning branch mentioned below.

[0142] The third switching circuit 33 may also include a fourth tuning branch 332, which can be connected in parallel with the third grounding branch 331. When the antenna assembly 104 is in the first mode, the fourth tuning branch 332 is turned on, and the fourth block point 122 can be grounded through the fourth tuning branch 332. The fourth tuning branch 332 can also be used to tune the signal, meeting the transmission requirements of different frequency bands in the first mode.

[0143] The tuning element of the fourth tuning branch 332 can be an inductor, as shown in [reference needed]. Figure 4 As shown, the fourth tuning branch 332 may include a series-connected switching element RF12 and an inductor L4. One end of the inductor L4 may be electrically connected to the fourth block point 122, and the other end of the inductor L4 may be grounded through the switching element RF12. When the switching element RF12 is in the on or off state, the fourth tuning branch 332 is turned on or off.

[0144] Of course, in some other embodiments, the tuning element of the fourth tuning branch 332 can also be a capacitor or other device capable of tuning.

[0145] In some frequency band signal transmission scenarios under the first mode, the fourth tuning branch 332 can be turned on to achieve signal tuning. Alternatively, in some frequency band signal transmission scenarios, the fourth tuning branch 332 can be kept off and not used for tuning, such as using the second tuning branch and / or the third tuning branch mentioned above.

[0146] In some embodiments of this disclosure, to meet the transmission requirements of different antenna modes or different frequency bands, the antenna assembly 104 may also include other tuning branches. For example, see... Figure 4 As shown, the antenna assembly 104 may further include a tuning branch 30d, which may be connected in parallel with the first grounding branch 30c to form a switching circuit 30e. For example, the tuning branch 30d may include an inductor L′ and a switching element RF9. One end of the inductor L′ may be connected to the fifth block point 113, and the other end of the inductor L′ may be grounded through the switching element RF9. When the switching element RF9 is in a conducting or cut-off state, the tuning branch 30d is turned on or off.

[0147] When the antenna assembly 104 is in the first mode, the tuning branch 30d can be turned on, so that the fifth block point 113 can be grounded through the tuning branch 30d. The tuning branch 30d is used to tune the signal and meet the transmission requirements of different frequency bands in the first mode.

[0148] Similarly, in some frequency band signal transmission scenarios under the first mode, the tuning branch 30d can be turned on to achieve signal tuning. Alternatively, in some frequency band signal transmission scenarios, the tuning branch 30d can be kept off, and tuning by the tuning branch 30d can be avoided.

[0149] For example, in some embodiments of this disclosure, the antenna assembly 104 may further include a tuning branch 30f, the tuning element of which may be a capacitor, such as... Figure 4 The capacitor C3 in the antenna assembly 104 has one end connected to the line connecting the second feed 50 and the third frame point 121, and the other end grounded. When the antenna assembly 104 is in the second mode, the signal can be tuned through the tuning branch 30f.

[0150] For example, in some embodiments of this disclosure, the antenna assembly 104 may further include a tuning branch 30g, the tuning element of which may be a capacitor C5. One end of the capacitor C5 may be connected to the line connecting the first feed 40 and the first frame point 111, and the other end of the capacitor C5 may be grounded. When the antenna assembly 104 is in the first mode, the signal can be tuned through the tuning branch 30g.

[0151] For example, in some embodiments of this disclosure, such as Figure 4 As shown, the antenna assembly 104 may also include a capacitor C9, which may be connected between the first feed 40 and the first frame point 111.

[0152] As described above, the antenna assembly 104 in this embodiment can be used in non-foldable electronic devices, and it can also be used in foldable electronic devices. It is understood that in the example where the antenna assembly 104 is applied to a foldable electronic device, when the electronic device is in a closed state, the first and second mid-frames of the electronic device are completely closed together and parallel to each other.

[0153] The antenna assembly 104 may include a second frame 20, which is part of the second middle frame, and the second frame 20 and the first frame 10 are rotatably fitted together. Figure 3 As shown, the second border 20 and the first border 10 are positioned opposite each other. For example, when the electronic device is in a closed state, the projections of the first border 10 and the second border 20 overlap each other (partially or completely) along the thickness direction (such as the z direction) of the electronic device, and the first border 10 and the second border 20 are stacked in the thickness direction (such as the z direction).

[0154] It is understandable that when the electronic device 100 is in a closed state, the distance between the first frame 10 and the second frame 20 in the thickness direction (such as the z direction) is relatively close. The metal second frame 20 will affect the antenna modes on the first frame 10, thereby reducing the communication performance of the antenna assembly 104 when the electronic device is in a closed state.

[0155] In embodiments of this disclosure, to address the issue of antenna performance degradation when the electronic device is in a closed state, see [link to relevant documentation]. Figure 3 As shown, the second frame 20 may include a third frame 21 and a fourth frame 22, with a second gap 23 between the third frame 21 and the fourth frame 22. That is, there is a gap between the third frame 21 and the fourth frame 22. For example, the second gap 23 between the third frame 21 and the fourth frame 22 may be filled with an electrically insulating structure, such as a plastic structure.

[0156] The positions of the third frame 21 and the fourth frame 22 correspond to the positions of the first frame 11 and the second frame 12, respectively. For example, when the electronic device is in a closed state, the projections of the first frame 11 and the third frame 21 overlap (partially or completely) along the thickness direction (such as the z-direction), and the projections of the second frame 12 and the fourth frame 22 overlap (partially or completely). Correspondingly, the positions of the first slit 13 and the second slit 23 can also correspond.

[0157] For example, in this embodiment of the disclosure, taking the first frame 11 and the second frame 12 as two parts of the third side frame of the first border 10, the third frame 21 and the fourth frame 22 can be two parts of the sixth side frame of the second border 20.

[0158] The third frame 21 has a sixth frame point 211 and a seventh frame point 212 at its two ends respectively. For example, the third frame 21 can have a sixth frame point 211 and a seventh frame point 212 at its two ends along the length direction (such as the y direction).

[0159] The fourth frame 22 has an eighth frame point 221, a ninth frame point 222, and a second grounding point 223 distributed sequentially. The eighth frame point 221 and the second grounding point 223 can be located at both ends of the fourth frame 22, for example, the eighth frame point 221 and the second grounding point 223 can be located at the two ends of the fourth frame 22 along the length direction (such as the y direction). The seventh frame point 212 can be located on the third frame 21 near one end of the fourth frame 22, and the eighth frame point 221 can be located on the fourth frame 22 near one end of the third frame 21. The seventh frame point 212 is positioned adjacent to the eighth frame point 221 among the sixth frame point 211, the seventh frame point 212, the eighth frame point 221, the ninth frame point 222, and the second grounding point 223. The second break 23 can be located between the seventh frame point 212 and the eighth frame point 221.

[0160] Similarly, the sixth frame point 211, the seventh frame point 212, etc. can be a certain position point on the frame structure (such as the third frame 21, the fourth frame 22, etc.), or they can be the protruding rib structure on the inner side of the frame structure.

[0161] The sixth frame point 211, the seventh frame point 212, the eighth frame point 221, the ninth frame point 222, and the second grounding point 223 can correspond to the positions of the first frame point 111, the second frame point 112, the third frame point 121, the fourth frame point 122, and the first grounding point 123, respectively. For example, along the thickness direction (such as the z-direction), the vertical projections of the first frame point 111 and the second frame point 112 overlap, the vertical projections of the second frame point 112 and the seventh frame point 212 overlap, the vertical projections of the third frame point 121 and the eighth frame point 221 overlap, the vertical projections of the fourth frame point 122 and the ninth frame point 222 overlap, and the vertical projections of the first grounding point 123 and the second grounding point 223 overlap.

[0162] Specifically, the straight-line distance between the sixth frame point 211 and the seventh frame point 212 can be the same as the straight-line distance between the first frame point 111 and the second frame point 112, for example, approximately 24 mm. The straight-line distance between the eighth frame point 221 and the ninth frame point 222 can be the same as the straight-line distance between the third frame point 121 and the fourth frame point 122, for example, approximately 8 mm. The straight-line distance between the ninth frame point 222 and the second grounding point 223 can be the same as the straight-line distance between the fourth frame point 122 and the first grounding point 123, for example, approximately 14 mm. The spacing of the second fracture 23 can be the same as the spacing of the first fracture 13, for example, approximately 1 mm. The straight-line distance between the sixth frame point 211 and the second grounding point 223 can be the same as the straight-line distance between the first frame point 111 and the first grounding point 123, for example, approximately 47 mm.

[0163] See Figure 3a As shown, the antenna assembly 104 also includes a fourth switching circuit 34, such as Figure 3a The fourth switching circuit SW4 is connected to the seventh frame point 212 and the eighth frame point 221 respectively. The fourth switching circuit 34 includes a switching element, which can include an on state and an off state. By changing the state of the switching element, the fourth switching circuit 34 can be turned on or off.

[0164] When antenna assembly 104 is in the first mode, the fourth switching circuit 34 is turned on, and the seventh frame point 212 and the eighth frame point 221 can be electrically connected through the fourth switching circuit 34, connecting the third frame 21 and the fourth frame 22 together. The third frame 21 and the fourth frame 22, located between the sixth frame point 211 and the second ground point 223, can jointly form the second parasitic stub. By utilizing the constructed second parasitic stub, the influence of the metal on the second frame 20 side on the communication signal transmission on the first radiating stub constructed on the first frame 10 side in the closed state can be effectively reduced, that is, the impact on the communication performance of antenna assembly 104 in the first mode can be reduced. For example, the second parasitic stub can be used to construct the parasitic stub mode of the LB antenna, reducing the decrease in communication performance of antenna assembly 104 in the LB antenna mode in the closed state, reducing the influence of the metal on the second frame 20 side on the LB antenna mode in the closed state, and further improving the communication performance of the LB antenna mode.

[0165] When antenna assembly 104 is in the second mode, the fourth switching circuit 34 is disconnected, the electrical connection between the seventh frame point 212 and the eighth frame point 221 is broken, and the electrical connection between the third frame 21 and the fourth frame 22 is disconnected. The ninth frame point 222 can be grounded, so that the portion of the fourth frame 22 located between the ninth frame point 222 and the eighth frame point 221 can serve as a third parasitic stub. The advantageously constructed third parasitic stub can effectively reduce the impact of the metal on the second frame side 20 (such as the portion of the fourth frame 22 located between the eighth frame point 221 and the ninth frame point 222) on the communication signal transmission on the second radiating stub constructed on the first frame side 10 when the second frame is closed, that is, reduce the impact on the communication performance of antenna assembly 104 in the second mode. For example, the third parasitic stub can be used to construct an n78 antenna parasitic stub mode, reduce the decrease in communication performance of antenna assembly 104 in the n78 antenna mode when the second frame is closed, reduce the impact of the metal on the n78 antenna mode when the second frame is closed, and further improve the communication performance of the n78 antenna mode.

[0166] To further improve the communication performance of antenna assembly 104, please refer to [link / reference needed]. Figure 3a As shown, the antenna assembly 104 also includes a fourth grounding branch 30h, which can be connected to the seventh frame point 212. For example, the fourth grounding branch 30h may include a switching element RF15 and a resistor element R4. One end of the resistor element R4 can be connected to the seventh frame point 212 through the switching element RF15, and the other end of the resistor element R4 can be grounded. When the switching element RF15 is in the on or off state, the fourth grounding branch 30h is on or off.

[0167] Antenna assembly 104 also includes a fifth switching circuit 35, such as Figure 3a The fifth switch circuit SW5 and the fifth switch circuit 35 are connected to the sixth block point 211, in combination with... Figure 4 As shown, the fifth switching circuit 35 may include one or more parallel fifth tuning branches, such as fifth tuning branch 351a, fifth tuning branch 351b and fifth tuning branch 351c.

[0168] The number of fifth tuning branches can be selected based on the requirements of the constructed fourth parasitic branch. For example, such as... Figure 4 An example of the fifth switching circuit 35 including three fifth tuning branches is shown.

[0169] When there are multiple fifth tuning branches, the tuning elements of the multiple fifth tuning branches can be of the same type or different types. For example, fifth tuning branch 351a may include a series-connected switching element RF17 and inductor L5. One end of inductor L5 is electrically connected to the sixth frame point 211, and the other end of inductor L5 is grounded through the switching element RF17. When the switching element RF17 is in a conducting or cut-off state, fifth tuning branch 351a is turned on or off. Fifth tuning branch 351b may include a series-connected switching element RF18 and inductor L6. One end of inductor L6 is electrically connected to the sixth frame point 211, and the other end of inductor L6 is grounded through the switching element RF18. When the switching element RF18 is in a conducting or cut-off state, fifth tuning branch 351b is turned on or off. The fifth tuning branch 351c may include a series-connected switching element RF19 and an inductor L7. One end of the inductor L7 is electrically connected to the sixth frame point 211, and the other end of the inductor L7 is grounded through the switching element RF19. When the switching element RF19 is in the on or off state, the fifth tuning branch 351c is turned on or off.

[0170] Of course, in some other embodiments, the tuning element of the fifth tuning branch can also be a capacitor or other device capable of tuning.

[0171] When antenna assembly 104 is in the second mode, the fourth grounding branch 30h is turned on, allowing the seventh frame point 212 to be grounded through the fourth grounding branch 30h, such that the seventh frame point 212 can achieve 0-ohm grounding through the fourth grounding branch 30h. At least one fifth tuning branch 351 is turned on, and the sixth frame point 211 is grounded through at least one fifth tuning branch. The portion of the third frame 21 located between the sixth frame point 211 and the seventh frame point 212 can serve as the fourth parasitic stub, and the fifth tuning branch can achieve the tuning effect on the signal frequency on the fourth parasitic stub. Further increasing the number of parasitic stubs constructed when antenna assembly 104 is in the second mode further reduces the influence of the metal on the second frame side 20 (such as the portion of the third frame 21 located between the sixth frame point 211 and the seventh frame point 212) on the communication signal transmission on the second radiating stub constructed on the first frame side 10 when the closed state is achieved, and more significantly reduces the impact on the communication performance of antenna assembly 104 in the second mode. For example, the parasitic stub can be used to construct the n78 antenna parasitic stub mode, reducing the influence of the metal on the second frame 20 side of the n78 antenna mode when it is closed, and further improving the communication performance of the n78 antenna mode.

[0172] When the antenna assembly 104 is in the second mode, one of the fifth tuning branches can be turned on, or multiple of the fifth tuning branches can be turned on.

[0173] To enable grounding of the ninth block point 222 in the second mode, the antenna assembly 104 also includes a sixth switching circuit 36, such as... Figure 4 The sixth switching circuit SW6 is connected to the ninth frame point 222. The sixth switching circuit SW6 may include a fifth grounding branch 361. For example, the fifth grounding branch 361 may include a switching element RF21 and a resistor element R5. One end of the resistor element R5 is connected to the ninth frame point 222, and the other end of the resistor element R5 is grounded through the switching element RF21. When the switching element RF21 is in the on or off state, the fifth grounding branch 361 is on or off.

[0174] When the antenna assembly 104 is in the second mode, the fifth grounding branch 361 can be turned on, so that the ninth frame point 222 can be grounded through the fifth grounding branch 361, thus realizing the 0-ohm grounding design of the ninth frame point 222, and then constructing the third parasitic branch.

[0175] In some embodiments of this disclosure, see Figure 4As shown, the fifth switching circuit 35 described above may also include a sixth tuning branch 352, which is connected in parallel with the fifth tuning branch. When the antenna assembly 104 is in the first mode, at least one of the sixth tuning branch 352 and the fifth tuning branch is turned on. The sixth block point 211 can be grounded through at least one of the sixth tuning branch 352 and the fifth tuning branch. By utilizing at least one of the fifth tuning branch and the sixth tuning branch 352, the signal on the second parasitic stub can be tuned, thereby matching and meeting the parasitic stub construction requirements of different frequency bands in the first mode.

[0176] For example, the tuning element of the sixth tuning branch 352 can be a capacitor, such as... Figure 4 As shown, the sixth tuning branch 352 may include a series-connected switching element RF20 and a capacitor C8. One end of the capacitor C8 may be electrically connected to the sixth block point 211, and the other end of the capacitor C8 may be grounded through the switching element RF20. When the switching element RF20 is in the on state or the off state, the sixth tuning branch 352 is turned on or off.

[0177] Of course, in some other embodiments, the tuning element of the sixth tuning branch 352 can also be an inductor or other devices capable of tuning.

[0178] In some frequency band signal transmission scenarios under the first mode, at least one of the sixth tuning branch 352 and the fifth tuning branch can be turned on, and tuning can be achieved using at least one of the sixth tuning branch 352 and the fifth tuning branch. Alternatively, in some frequency band signal transmission scenarios, the fifth tuning branch and the sixth tuning branch 352 can be kept off, and tuning can be achieved without using the fifth switching circuit 35.

[0179] In some embodiments of this disclosure, see Figure 4 As shown, the fourth switching circuit 34 described above may include two parallel seventh tuning branches, such as... Figure 4 The seventh tuning branch 341a and the seventh tuning branch 341b are included. When the antenna assembly 104 is in the first mode, at least one of the two seventh tuning branches can be turned on, so that the seventh block point 212 and the eighth block point 221 can be electrically connected through at least one seventh tuning branch.

[0180] The seventh tuning branch can also be used to tune the signal frequency, thus meeting the construction requirements of the parasitic stub mode in the first mode. Correspondingly, the design of two parallel seventh tuning branches can match the construction requirements of parasitic stubs in different frequency bands in the first mode. For example, selectively changing the on / off state of the two seventh tuning branches can change the tuning branch connected to the second parasitic stub. Different tuning branches have different tuning elements, thereby matching and meeting the construction requirements of parasitic stubs in multiple frequency bands. This can satisfy the transmission requirements of multiple frequency bands in the LB antenna mode, such as band 28 (B28), band 20 (B20), band 5 (B5), and band 8 (B8).

[0181] For example, see Figure 4 As shown, taking seven tuning branches 341a and 341b as examples, when seven tuning branch 341a is turned on, seven tuning branch 341b is turned off. Or, seven tuning branch 341b is turned on, and seven tuning branch 341a is turned off. Or, both seven tuning branches 341a and 341b are turned on, resulting in different tuning degrees for the signal on the second parasitic stub, thus satisfying the construction requirements of parasitic stubs in multiple frequency bands.

[0182] Specifically, based on the parasitic structure requirements of signals in different frequency bands, at least one of the two seventh tuning branches can be selectively turned on, and one or both of the seventh tuning branches can be used to achieve the tuning function.

[0183] For example, the tuning element of each seventh tuning branch can be a capacitor. One of the seventh block point 212 and the eighth block point 221 can be electrically connected to one end of the capacitor, and the other of the seventh block point 212 and the eighth block point 221 can be connected to the other end of the capacitor through a switching element, so that a capacitor and a switching element are connected in series between the seventh block point 212 and the eighth block point 221. See, for example, Figure 4 As shown, taking the seventh tuning branch 341a as an example, it may include a series-connected switching element RF13 and a capacitor C6. One end of the capacitor C6 can be electrically connected to the eighth frame point 221, and the other end of the capacitor C6 can be electrically connected to the seventh frame point 212 through the switching element RF13. When the switching element RF13 is in the on state or the off state, the seventh tuning branch 341a is on or off.

[0184] To meet the parasitic configuration requirements of multi-band operation in the first mode, see [reference needed]. Figure 4 As shown, the sixth switching circuit 36 ​​described above may further include an eighth tuning branch 362, which is connected in parallel with the fifth grounding branch 361. For example, as... Figure 4As shown, the eighth tuning branch 362 may include a series-connected switching element RF22 and an inductor L8. One end of the inductor L8 may be electrically connected to the ninth block point 222, and the other end of the inductor L8 may be grounded through the switching element RF22. When the switching element RF22 is in the on or off state, the eighth tuning branch 362 is turned on or off.

[0185] When the antenna assembly 104 is in the first mode, the eighth tuning branch 362 is turned on, and the ninth block point 222 is grounded through the eighth tuning branch 362. The eighth tuning branch 362 can also be used to tune the signal, satisfying the parasitic structure requirements of different frequency bands in the first mode.

[0186] Of course, in some other embodiments, the tuning element of the eighth tuning branch 362 can also be a capacitor or other device capable of tuning.

[0187] In some frequency band signal transmission scenarios under the first mode, the eighth tuning branch 362 can be turned on to tune the frequency of the signal on the second parasitic stub. Alternatively, in some frequency band signal transmission scenarios, the eighth tuning branch 362 can be kept off and not used for tuning.

[0188] In some embodiments of this disclosure, to meet the construction requirements of parasitic stubs under different antenna modes or different frequency bands, the antenna assembly 104 may also include other tuning branches. For example, see... Figure 4 As shown, the antenna assembly 104 may also include a tuning branch 30i. For example, the tuning branch 30i may include an inductor L″ and a switching element RF16. One end of the inductor L″ can be connected to the seventh block point 212 through the switching element RF16, and the other end of the inductor L″ can be grounded. When the switching element RF16 is in the on state or the off state, the tuning branch 30i is turned on or off.

[0189] When the antenna assembly 104 is in the first mode, the tuning branch 30i can be turned on, so that the seventh frame point 212 can be grounded through the tuning branch 30i. The tuning branch 30i is used to tune the signal and meet the parasitic structure requirements of different frequency bands in the first mode.

[0190] The following examples illustrate the specific implementation methods of the LB antenna and the n78 antenna, using the antenna assembly 104 in the first mode to construct the LB antenna mode and realize the transmission of signals in multiple frequency bands of the LB antenna, and the antenna assembly 104 in the second mode to construct the n78 antenna mode.

[0191] Among them, such as Figure 4As shown, in the first switching circuit SW1, the second tuning branch 311a may include a switching element RF1 and a capacitor C1 connected in series, and the second tuning branch 311b may include a switching element RF2 and a capacitor C2 connected in series.

[0192] The first tuning branch 30b may include a series-connected switching element RF3 and an inductor L1.

[0193] The disconnect switch 30a between the second feed source 50 and the third frame point 121 is a switching element RF4, and the tuning branch 30f may include a capacitor C3.

[0194] In the second switching circuit SW2, the third tuning branch 322a may include a series-connected switching element RF5 and inductor L2; the third tuning branch 322b may include a series-connected switching element RF6 and capacitor C4; and the third tuning branch 322c may include a series-connected switching element RF7 and inductor L3. The second grounding branch 321 may include a series-connected switching element RF8 and resistor R1.

[0195] In the switching circuit 30e, the tuning branch 30d may include an inductor L' connected in series and a switching element RF9. The first grounding branch 30c may include a switching element RF10 connected in series and a resistive element R2. The tuning branch 30g may include a capacitor C5.

[0196] In the third switching circuit SW3, the third grounding branch 331 may include a series-connected switching element RF11 and a resistor element R3, and the fourth tuning branch 332 may include a series-connected switching element RF12 and an inductor L4.

[0197] In the fourth switching circuit SW4, the seventh tuning branch 341a may include a series-connected switching element RF13 and a capacitor C6, and the seventh tuning branch 341b may include a series-connected switching element RF14 and a capacitor C7.

[0198] The fourth grounding branch 30h may include a switching element RF15 and a resistive element R4, and the tuning branch 30i may include an inductor L" connected in series and a switching element RF16.

[0199] In the fifth switching circuit SW5, the fifth tuning branch 351a may include a series-connected switching element RF17 and inductor L5; the fifth tuning branch 351b may include a series-connected switching element RF18 and inductor L6; and the fifth tuning branch 351c may include a series-connected switching element RF19 and inductor L7. The sixth tuning branch 352 may include a series-connected switching element RF20 and capacitor C8.

[0200] In the sixth switching circuit SW6, the fifth grounding branch 361 may include a series-connected switching element RF21 and a resistive element R5, and the eighth tuning branch 362 may include a series-connected switching element RF22 and an inductor L8.

[0201] The following is an example illustrating the implementation of different frequency band signal transmission (TX) and reception (RX) when the electronic device is in a closed state, the antenna assembly 104 is configured as an LB antenna in the first mode.

[0202] In the B28TX scenario, the switching elements in the second switching circuit SW2, the third switching circuit SW3, the fourth switching circuit SW4, the switching circuit 30e, and the sixth switching circuit SW6 are all in the off state (OFF). Switching elements RF1 and RF2 in the first switching circuit SW1 are in the on state (ON), enabling the second tuning branches 311a and 311b to conduct, achieving tuning and lowering the low-frequency mode. This constructs the B28TX antenna current mode on the first frame 10 side, effectively improving the B28TX radiation efficiency. Switching element RF20 in the fifth switching circuit SW5 is in the on state, and switching elements RF13 and RF14 in the fourth switching circuit SW4 are in the on state, enabling the seventh tuning branches 341a and 341b to conduct, lowering the low-frequency mode and constructing the parasitic branch mode of the B28TX on the second frame 20 side. This effectively reduces the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when the electronic device is in the closed state.

[0203] In the B2RX scenario, the switching elements in switch circuit 30e, the third switch circuit SW3, and the sixth switch circuit SW6 are all in the off state. Switch elements RF1 and RF2 in the first switch circuit SW1 are in the on state, and RF5 in the second switch circuit SW2 is in the on state, pulling down the low-frequency mode and constructing the B28RX antenna current mode on the first frame 10 side, effectively improving the B28RX radiation efficiency. Switch element RF17 in the fifth switch circuit SW5 is in the on state, and switch elements RF13 and RF14 in the fourth switch circuit SW4 are in the on state, pulling down the low-frequency mode and constructing the parasitic branch mode of B28RX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0204] In the B20RX scenario, the switching elements in switch circuit 30e, the third switch circuit SW3, the sixth switch circuit SW6, and the fifth switch circuit SW5 are all in the off state. Switch element RF2 in the first switch circuit SW1 is in the on state, and switch element RF6 in the second switch circuit SW2 is in the on state, with the low-frequency mode pulled high, constructing the B20RX antenna current mode on the first frame 10 side, effectively improving the B20RX radiation efficiency. Switch element RF13 in the fourth switch circuit SW4 is in the on state, with the low-frequency mode pulled high, constructing the parasitic stub mode of the B20RX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0205] In the B20TX scenario, the switching elements in the second switching circuit SW2, switching circuit 30e, third switching circuit SW3, and sixth switching circuit SW6 are all in the off state. The switching element RF2 in the first switching circuit SW1 is in the on state, with the low-frequency mode pulled high, constructing the B20TX antenna current mode on the first frame 10 side, effectively improving the B20TX radiation efficiency. The switching element RF18 in the fifth switching circuit SW5 is in the on state, and the switching element RF13 in the fourth switching circuit SW4 is in the on state, with the low-frequency mode pulled high, constructing the parasitic stub mode of the B20TX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when in the closed state.

[0206] In the B5TX scenario, the switching elements in the second switching circuit SW2, switching circuit 30e, third switching circuit SW3, and sixth switching circuit SW6 are all in the off state. The switching element RF2 in the first switching circuit SW1 is in the on state, with the low-frequency mode pulled high, constructing the B5TX antenna current mode on the first frame 10 side, effectively improving the B5TX radiation efficiency. The switching element RF18 in the fifth switching circuit SW5 is in the on state, and the switching element RF13 in the fourth switching circuit SW4 is in the on state, with the low-frequency mode pulled high, constructing the parasitic stub mode of B5TX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0207] In the B5RX scenario, the switching elements in the second switching circuit SW2, switching circuit 30e, and the sixth switching circuit SW6 are all in the off state. The switching element RF2 in the first switching circuit SW1 is in the on state, and the switching element RF12 in the third switching circuit SW3 is in the on state, with the low-frequency mode pulled high, constructing the B5RX antenna current mode on the first frame 10 side, effectively improving the B5RX radiation efficiency. The switching element RF19 in the fifth switching circuit SW5 is in the on state, and the switching element RF13 in the fourth switching circuit SW4 is in the on state, with the low-frequency mode pulled high, constructing the parasitic stub mode of B5RX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0208] In the B8TX scenario, the switching elements in the second switching circuit SW2, switching circuit 30e, and the sixth switching circuit SW6 are all in the off state. The switching element RF2 in the first switching circuit SW1 is in the on state, and the switching element RF12 in the third switching circuit SW3 is in the on state, with the low-frequency mode pulled high, constructing the B8TX antenna current mode on the first frame 10 side, effectively improving the B8TX radiation efficiency. The switching element RF19 in the fifth switching circuit SW5 is in the on state, and the switching element RF13 in the fourth switching circuit SW4 is in the on state, with the low-frequency mode pulled high, constructing the parasitic stub mode of B8TX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0209] In the B8RX scenario, the switching elements in switch circuit 30e are in the off state, while switching elements RF2, RF7, and RF12 in the first, second, and third switch circuits SW3 are in the on state, constructing the B8RX antenna current mode on the first frame 10 side, effectively improving the B8RX radiation efficiency. Switch elements RF19, RF12, RF12, and RF13 in the fifth, sixth, and fourth switch circuits SW4 are in the on state, pulling up the low-frequency mode and constructing the parasitic stub mode of B8RX on the second frame 20 side, effectively reducing the influence of the metal material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0210] The following is an example illustrating how signal transmission is implemented when the electronic device is in a closed state and the antenna assembly 104 is configured as an n78 antenna in the second mode.

[0211] In N78 antenna mode, the disconnect switch 30a is in the ON state, the switching element in the first switching circuit SW1 is in the OFF state, and the switching element RF11 in the third switching circuit SW3 is in the ON state, constructing the quarter-current mode of the N78 antenna on the first frame 10 side. The switching element RF8 in the second switching circuit SW2 is in the ON state, the switching element RF10 in the switching circuit 30e is in the ON state, and the switching element RF3 in the first tuning branch 30b is in the ON state, constructing the electrical parasitic mode of the N78 antenna, effectively improving the radiation efficiency of the N78 antenna. The switching element RF15 in the fourth grounding branch 30h is in the ON state, and the switching elements RF17, RF18, and RF19 in the fifth switching circuit SW5 are all in the ON state. The switching element RF21 in the sixth switching circuit SW6 is in the ON state, constructing the parasitic branch mode of the N78 on the second frame 20 side, effectively reducing the influence of the gold material on the second frame 20 side on the antenna constructed on the first frame 10 side when closed.

[0212] Table 1 shows examples of matching values ​​for each inductor in an antenna assembly according to some embodiments of the present disclosure.

[0213] L1 L2 L3 L4 L5 L6 L7 L8 L9 Matching value (nH) 3.3 27 18 5.6 22 18 10 4.1 100

[0214] Table 2 shows examples of matching values ​​for each capacitor in an antenna assembly according to some embodiments of the present disclosure.

[0215] C1 C2 C3 C4 C5 C6 C7 C8 C9 Matching value (pF) 2 2 0.9 0.5 2 2 2 1 3

[0216] Table 3 shows examples of matching values ​​for each resistive element in an antenna assembly according to some embodiments of the present disclosure.

[0217] R1 R2 R3 R4 R5 Matching value (ohms) 0 0 0 0 0

[0218] Figure 5 This is a schematic diagram illustrating the current distribution in an antenna assembly according to some embodiments of the present disclosure.

[0219] The electronic components in the switching circuit of the antenna assembly use the matching values ​​described above, see [link to relevant documentation]. Figure 5 As shown, when the antenna assembly is in the first mode, the constructed LB antenna has a uniform current distribution, which can reduce the radiation of electronic devices to users.

[0220] When the electronic device is in the open or intermediate state, the implementation methods of the two antenna modes of the antenna assembly, such as the LB antenna and the n78 antenna, can be found in the implementation methods when the electronic device is in the closed state, and will not be repeated here.

[0221] Figure 6This is a simulation diagram illustrating the radiation efficiency of an LB antenna constructed from an antenna assembly when the electronic device is in a closed state, according to some embodiments of the present disclosure.

[0222] Table 4 is a table showing the efficiency results of an LB antenna constructed from an antenna assembly when the electronic device is in a closed state, according to some embodiments of the present disclosure.

[0223]

[0224]

[0225] Depend on Figure 6 As shown in Table 4, when the electronic device is in a closed state, the LB antenna constructed by the antenna assembly has high radiation efficiency, which enables the constructed LB antenna to have high communication performance.

[0226] Figure 7 This is a simulation diagram illustrating the radiation efficiency of an LB antenna constructed from an antenna assembly when the electronic device is in the on state, according to some embodiments of the present disclosure.

[0227] Table 5 is a table showing the efficiency results of the antenna assembly constructing an LB antenna when the electronic device is in the on state, according to some embodiments of the present disclosure.

[0228]

[0229] Depend on Figure 7 As shown in Table 5, when the electronic device is in the open state, the LB antenna constructed by the antenna assembly has high radiation efficiency, which enables the constructed LB antenna to have high communication performance.

[0230] Figure 8 This is a simulation diagram illustrating the radiation efficiency of an n78 antenna constructed from an antenna assembly when the electronic device is in a closed and open state, according to some embodiments of the present disclosure.

[0231] Table 6 is a table showing the efficiency results of the antenna assembly constructing an n78 antenna when the electronic device is in a closed state and an open state, according to some embodiments of the present disclosure.

[0232]

[0233] Depend on Figure 8 As shown in Table 6, the n78 antenna constructed by the antenna assembly has high radiation efficiency when the electronic device is in both the closed and open states, thus enabling the constructed n78 antenna to have high communication performance.

[0234] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of how this disclosure can be practiced. In this regard, terms indicating direction or positional relationship, such as “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “top,” “bottom,” “inner,” and “outer,” can be used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the above detailed description should not be considered limiting.

[0235] It should be understood that, unless otherwise specifically indicated, features of various embodiments of this disclosure described herein can be combined with each other. As used herein, the term “and / or” includes any one of the relevant listed items and any combination of any two or more; similarly, “at least one of…” includes any one of the relevant listed items and any combination of any two or more.

[0236] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0237] Furthermore, the term "above" as used herein with respect to components, elements, or material layers formed or located "above" a surface may be used to indicate that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the term "above" as used with respect to components, elements, or material layers formed or located "above" a surface may also optionally have a specific meaning: that the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, for example, in direct contact with the surface.

[0238] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0239] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0240] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0241] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0242] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna assembly, characterized in that, include: The first frame includes a first frame body and a second frame body, with a first gap between the first frame body and the second frame body. The first frame body has a first frame point and a second frame point at its two ends, respectively. The second frame body has a third frame point, a fourth frame point and a first grounding point distributed sequentially. The third frame point and the first grounding point are located at both ends of the second frame body. The third frame point is located adjacent to the second frame point. The first frame point is electrically connected to a first feed source. A first switching circuit is connected to the second frame point and the third frame point respectively; The antenna assembly includes a first mode and a second mode. When the antenna assembly is in the first mode, the first switching circuit is turned on, and the second frame point is electrically connected to the third frame point through the first switching circuit. The first frame and the second frame located between the first frame point and the first ground point serve as the first radiating branch. When the antenna assembly is in the second mode, the third frame point is electrically connected to the second feed source, the first switching circuit is disconnected, the fourth frame point is grounded, and the second frame located between the third frame point and the fourth frame point serves as the second radiating branch.

2. The antenna assembly according to claim 1, characterized in that, Also includes: The first tuning branch is connected to the second frame point; First grounding branch; The first frame also has a fifth frame point, which is located between the first frame point and the second frame point, and the first grounding branch is connected to the fifth frame point; When the antenna assembly is in the second mode, the first tuning branch is turned on, and the second block point is grounded through the first tuning branch. The first grounding branch is connected, and the fifth frame point is grounded through the first grounding branch; The first frame located between the fifth frame point and the second frame point serves as the first parasitic branch.

3. The antenna assembly according to claim 2, characterized in that, It also includes a second switching circuit, which is connected to the first block point, and the second switching circuit includes a second grounding branch; When the antenna assembly is in the second mode, the second grounding branch is turned on, and the first block point is grounded through the second grounding branch.

4. The antenna assembly according to any one of claims 1-3, characterized in that, The first switching circuit includes two parallel second tuning branches; When the antenna assembly is in the first mode, at least one of the second tuning branches is turned on.

5. The antenna assembly according to claim 3, characterized in that, The second switching circuit also includes one or more third tuning branches connected in parallel with the second grounding branch; When the antenna assembly is in the first mode, at least one of the third tuning branches is turned on, and the first block point is grounded through the third tuning branch.

6. The antenna assembly according to any one of claims 1-3, characterized in that, It also includes a third switching circuit, which is connected to the fourth frame point. The third switching circuit includes a third grounding branch and a fourth tuning branch connected in parallel. When the antenna assembly is in the second mode, the third grounding branch is turned on, and the fourth frame point is grounded through the third grounding branch; When the antenna assembly is in the first mode, the fourth tuning branch is turned on, and the fourth frame point is grounded through the fourth tuning branch.

7. The antenna assembly according to any one of claims 1-3, characterized in that, It also includes an isolation switch connected between the second feed source and the third frame point.

8. The antenna assembly according to claim 2, characterized in that, It also includes a matching inductor, one end of which is electrically connected to the fifth frame point, and the other end of which is grounded.

9. The antenna assembly according to any one of claims 1-3, characterized in that, Also includes: The second frame is used to rotatably engage with the first frame; the second frame includes a third frame and a fourth frame, with a second gap between the third frame and the fourth frame, the third frame having a sixth frame point and a seventh frame point at its two ends respectively, and the fourth frame having an eighth frame point, a ninth frame point, and a second grounding point distributed sequentially, the eighth frame point and the second grounding point being located at both ends of the fourth frame, the sixth frame point, the seventh frame point, the eighth frame point, the ninth frame point, and the second grounding point corresponding to the positions of the first frame point, the second frame point, the third frame point, the fourth frame point, and the first grounding point respectively; The fourth switching circuit is connected to the seventh frame point and the eighth frame point respectively; When the antenna assembly is in the first mode, the fourth switch circuit is turned on, the seventh frame point and the eighth frame point are electrically connected through the fourth switch circuit, and the third frame and the fourth frame located between the sixth frame point and the second ground point serve as the second parasitic branch. When the antenna assembly is in the second mode, the fourth switch circuit is disconnected, the ninth frame point is grounded, and the fourth frame located between the ninth frame point and the eighth frame point serves as the third parasitic branch.

10. The antenna assembly according to claim 9, characterized in that, Also includes: The fourth grounding branch is connected to the seventh frame point; The fifth switching circuit includes one or more parallel fifth tuning branches, and the fifth switching circuit is connected to the sixth frame point; When the antenna assembly is in the second mode, the fourth grounding branch is turned on, and the seventh frame point is grounded through the fourth grounding branch; At least one of the fifth tuning branches is turned on, and the sixth frame point is grounded through at least one of the fifth tuning branches; The third frame located between the sixth frame point and the seventh frame point serves as the fourth parasitic branch.

11. The antenna assembly according to claim 10, characterized in that, The fifth switching circuit also includes a sixth tuning branch connected in parallel; When the antenna assembly is in the first mode, at least one of the sixth tuning branch and the fifth tuning branch is turned on, and the sixth frame point is grounded through at least one of the sixth tuning branch and the fifth tuning branch.

12. The antenna assembly according to claim 9, characterized in that, The fourth switching circuit includes two parallel seventh tuning branches; When the antenna assembly is in the first mode, at least one of the seventh tuning branches is turned on.

13. The antenna assembly according to claim 9, characterized in that, It also includes a sixth switching circuit, which is connected to the ninth block point. The sixth switching circuit includes a fifth grounding branch and an eighth tuning branch connected in parallel. When the antenna assembly is in the second mode, the fifth grounding branch is turned on, and the ninth frame point is grounded through the fifth grounding branch; When the antenna assembly is in the first mode, the eighth tuning branch is turned on, and the ninth block point is grounded through the eighth tuning branch.

14. The antenna assembly according to claim 4, characterized in that, The second tuning branch includes a switching element and a capacitor; One of the second and third points is electrically connected to one end of the capacitor, and the other of the second and third points is connected to the other end of the capacitor via the switching element.

15. An electronic device, characterized in that, Includes a first feed source, a second feed source, and the antenna assembly described in any one of claims 1-14 above; The first feed source is electrically connected to the first frame point of the antenna assembly, and the second feed source is electrically connected to the third frame point of the antenna assembly.

16. The electronic device according to claim 15, characterized in that, It also includes a pivot structure, through which the first frame and the second frame rotate to allow the electronic device to open and close.

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